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- Title
Ionic conductivity of the phases of five types formed in the BaF-GdF system.
- Authors
Sorokin, N.; Sobolev, B.
- Abstract
The ionic conductivity has been measured in ceramic phases of five structure types found in the BaF-GdF system: the fluorite type (CaF), its trigonal and tetragonal distortions, the tysonite type (LaF), and the orthorhombic β-YF modification. The phases have been obtained by solid-phase synthesis from BaF and GdF mixtures in hermetic nickel containers at 925, 964, and 1067°C for 108-360 h in a fluorine atmosphere. Their conductivity σ is compared in correlation with the composition and structure type. The highest conductivity values are found for the tysonite GdBaF phase (0.10 ≤ y ≤ 0.25): (1−2) × 10 S/cm at 683 K. The ordered BaGdF and BaGdF phases with fluorite-derived structures and different degrees of order are characterized by the lowest conductivities: i(1.5−3.5 × 10) S/cm.
- Subjects
IONIC conductivity; TYSONITE; CERAMIC materials; MOLECULAR structure; SOLID-phase synthesis; FLUORINE
- Publication
Crystallography Reports, 2012, Vol 57, Issue 4, p555
- ISSN
1063-7745
- Publication type
Article
- DOI
10.1134/S1063774512030200